Trying to play this piece and it is in 3 sharps (F,C,G). In one measure the F is natural, then in the next measure it has a hold-over then the next measure has a sharp beside it. And the very next measure the F (one octave higher) has a sharp sign. So, is the sharp to let you know that is isn't a natural anymore or do you play it as a double sharp, since the F is to be played as as sharp?
Thanks!